Method for planting poplar forest which is used as pulpwood in ultrashort period. The steps are: to apply fertilizer to soil, to level the land, then to do rotary tillage, to complete ditching, cutting, hilling and rolling synchronistically by using planting machine. To keep water-holding capacity of the soil in a setting range, the drip irrigation auto-control equipment is used for irrigation. To do top application of chemical fertilizer and spray chemical nitrofen for weeding. The branches of the trees can be cut out in autumn current year, and trees growing to forest in spring next yeart. The forest can be utilized 6 to 7 years as cutting branch in autumn each year. The advantages are: reducing labour strength, saving water of irrigation, high survival rate of young growth, short prodn. period, high output of poplar and low cost.